PSW pushswitch on PCB1
PSW1: enter.
PSW2, 3, 4 and 5: for checking.
Part name Contents of functions
RSW & DSWs
DSW1, RSW1 Refrigerant cycle number setting.
DSW2 Capacity setting.
DSW3 Setting not required.
DSW4 Operational test and service settings.
DSW5 Emergency operation / operational test and service setting.
DSW6 Setting outdoor unit number.
DSW7 Supply voltage setting.
DSW10 Communication setting.
Part name Contents of functions
LEDs
LED1 (Red)
PCB1 power indication (Low voltage).
Normal condition: activated.
Abnormal condition: not activated.
LED2 (Green)
LED2 indicates the transmission status between PCB1 and PCB2.
Normal condition: flashing.
Abnormal condition: activated or not activated.
LED3 (Yellow)
LED3 indicates the transmission status between the indoor and outdoor units.
Normal condition: flashing.
Abnormal condition: activated or not activated.
LED4 (orange)
LED4 indicates the transmission status between outdoor units.
Normal condition: flashing.
Abnormal condition: activated or not activated.
LED5 (Red)
PCB1 power indication (High voltage).
Normal condition: activated.
Abnormal condition: not activated.
SEGs SEG1, SEG2 Indicate the following: "Alarm", "Safety protection device has been activated' or "Checking items".
b. Inverter printed circuit board: PCB2 (and transistor module)
DSW1
PCB2 for Inverter
CN2
CN206
CN207
LED202 (Yellow)
UVW
LED201 (Red)
C
N
P
PCN301
Screw (M5)
Screw (M5)
Transistor Module
Fixing Screws for
T
ransistor Module (M4)
Fixing Screws for
Transistor Module (M4)
Fixing Screws for
Transistor Module (M4)
8 Troubleshooting
259
SMGB0065 rev. 1 - 12/2010
8
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